From the dropdown menu, look for temporary_1_40 - 1.40.x for incompatible mods . Steam will automatically download the patched 1.40 files.
If you are looking for information on the ETS2 v1.40 download, this guide covers the features of that update, how to manage your version on official platforms, and the importance of using verified files. Why Version 1.40 Was a Milestone euro truck simulator 2 v140 download patched
This was the headline feature. SCS Software overhauled the entire lighting engine to use physical light sources and realistic intensities. From the dropdown menu, look for temporary_1_40 - 1
Most players looking for a "patched" version are often trying to maintain compatibility with specific mods (like ProMods) that haven't been updated to the latest build, or they are running on older hardware. Using the Steam Beta Tab From the dropdown menu